Traditionally, Wikipedia encouraged you to "be bold", that is, if you think something is wrong, don't complain, don't ask for permission, just fix it. [1]
But now that Wikipedia is becoming more stable, I wonder if this policy is still pushed as much. My understanding is that on all articles there is an army of autistic and obsessive people who will make sure it stays clean (I mean it in a good way), so if you mess things up, it won't last long, as in, seconds.